Created
July 8, 2016 15:19
-
-
Save hansen-m/3e9632ce6fd5b9e3a768321dc5bb4bdc to your computer and use it in GitHub Desktop.
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
// | |
// NVRAMManager.swift | |
// | |
// Created by Matt Hansen on 1/30/16. | |
// The Pennsylvania State University. | |
// | |
// http://www.opensource.apple.com/source/system_cmds/system_cmds-643.30.1/nvram.tproj/nvram.c | |
import IOKit | |
import Foundation | |
let masterPort = IOServiceGetMatchingService(kIOMasterPortDefault, nil) | |
let gOptionsRef = IORegistryEntryFromPath(masterPort, "IODeviceTree:/options") | |
let serviceIOPlatformExpertDevice = IOServiceGetMatchingService(kIOMasterPortDefault, IOServiceMatching("IOPlatformExpertDevice")) | |
class NVRAM { | |
func SetOFVariable(name: String, value: String) { | |
let nameRef = CFStringCreateWithCString(kCFAllocatorDefault, name, CFStringBuiltInEncodings.UTF8.rawValue) | |
// As CFString (Switched to NSData due to issues with trailing %00 characters in values after reboot) | |
//let valueRef = CFStringCreateWithCString(kCFAllocatorDefault, value, CFStringBuiltInEncodings.UTF8.rawValue) | |
// CFData is “toll-free bridged” with its Cocoa Foundation counterpart, NSData. | |
let valueRef = value.dataUsingEncoding(NSASCIIStringEncoding) | |
IORegistryEntrySetCFProperty(gOptionsRef, nameRef, valueRef) | |
} | |
func GetOFVariable(name: String) -> String { | |
let nameRef = CFStringCreateWithCString(kCFAllocatorDefault, name, CFStringBuiltInEncodings.UTF8.rawValue) | |
let valueRef = IORegistryEntryCreateCFProperty(gOptionsRef, nameRef, kCFAllocatorDefault, 0) | |
if (valueRef != nil) { | |
// Read as NSData | |
if let data = valueRef.takeUnretainedValue() as? NSData { | |
return NSString(data: data, encoding: NSASCIIStringEncoding)! as String | |
} | |
// Read as String | |
return valueRef.takeRetainedValue() as! String | |
} else { | |
return "" | |
} | |
} | |
func PrintOFVariables() { | |
let dict = UnsafeMutablePointer<Unmanaged<CFMutableDictionaryRef>?>.alloc(1) | |
let result = IORegistryEntryCreateCFProperties(gOptionsRef, dict, kCFAllocatorDefault, 0) | |
if let resultDict = dict.memory?.takeUnretainedValue() as Dictionary? { | |
print(resultDict, result) | |
} | |
} | |
func GetPlatformAttributeForKey(key: String) -> String { | |
let nameRef = CFStringCreateWithCString(kCFAllocatorDefault, key, CFStringBuiltInEncodings.UTF8.rawValue) | |
let valueRef = IORegistryEntryCreateCFProperty(serviceIOPlatformExpertDevice, nameRef, kCFAllocatorDefault, 0) | |
// Read as NSData | |
if let data = valueRef.takeUnretainedValue() as? NSData { | |
return NSString(data: data, encoding: NSASCIIStringEncoding)! as String | |
} else { | |
// Read as String | |
return valueRef.takeRetainedValue() as! String | |
} | |
} | |
func ClearOFVariable(key: String) { | |
IORegistryEntrySetCFProperty(gOptionsRef, kIONVRAMDeletePropertyKey, key) | |
} | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
This needs updates for swift 4/5 since lots of Foundation types are now implemented as structs